Spatial Probing of MgII Absorption in ``Halo'' Gas through Adaptive Mesh Refinement Simulations of Galaxies

Details Spatial Probing of MgII Absorption in ``Halo'' Gas through Adaptive Mesh Refinement Simulations of Galaxies Spatial Probing of MgII Absorption in ``Halo'' Gas through Adaptive Mesh Refinement Simulations of Galaxies

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.7713c&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #77.13; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present a mock quasar absorption line survey through a simulation of an evolving Milky Way--like galaxy from z=1 to z=0.5 that undergoes a merging at z = 0.6. The synthesized absorption lines are presented as HIRES/UVES quality spectra of the MgII λ 2796 transition. We probe the region surrounding the galaxy in a 30 × 30 kpc grid with separations of 10 kpc. The simulations were performed using the Eulerian gasdynamics plus N--body Adaptive Refinement Tree (ART) code (Kravtsov 2003, ApJ, 590, L1). The code implements metallicity dependent cooling, star formation, and thermal feedback. The simulated box size is 10 Mpc h-1 with a force resolution between 60--200 pc.
We examine the spatial variations and temporal evolution of the MgII absorbing gas kinematics. We also explore various orientations of the galaxy, including face--on and edge--on inclinations. We find that gas kinematics are confined to velocity spreads of 300 km s-1 with respect to the galaxy systemic velocity. We examine the covering factor of the MgII absorbing gas as a function of equivalent width and compare with our observations of 40 MgII absorption selected galaxies studied via HST\/ imaging and HIRES/UVES absorption line data (Kacprzak et al.\ 2006, ApJ, submitted). We find that the simulations underpredict the covering factor of strong absorbers, which may indicate either some problems with overcooling or angular momentum loss, or bias in the observational data.

Affiliated with

Also associated with

No associations

Rating

Spatial Probing of MgII Absorption in ``Halo'' Gas through Adaptive Mesh Refinement Simulations of Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spatial Probing of MgII Absorption in ``Halo'' Gas through Adaptive Mesh Refinement Simulations of Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spatial Probing of MgII Absorption in ``Halo'' Gas through Adaptive Mesh Refinement Simulations of Galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1157987